[PATCH] D104156: [DAGCombine][X86][ARM] EXTRACT_SUBVECTOR(VECTOR_SHUFFLE(?,?,Mask)) -> VECTOR_SHUFFLE(EXTRACT_SUBVECTOR(?, ?), EXTRACT_SUBVECTOR(?, ?), Mask')

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

In D104156#3189248 <https://reviews.llvm.org/D104156#3189248>, @lebedev.ri wrote:

> In D104156#3188695 <https://reviews.llvm.org/D104156#3188695>, @RKSimon wrote:
>
>> LGTM - cheers @lebedev.ri !
>
> Hmm. Thank you for the review.
> I will admit, in an alternative reality this comment was going to be "let me just abandon this".

I'm mainly interested in the rotation splat fixes as this removes a headache for some ongoing work for better vector rotation/funnel shift codegen.


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  https://reviews.llvm.org/D104156/new/

https://reviews.llvm.org/D104156